oracle – hashing method, excluding DBMS_CRYPTO


Is there any way to get the same hash for the text field with the same text? All below methods give different results for the same text as they seem depending on rowid, or something similar:

SELECT
 , utl_raw.cast_to_raw(sys_op_map_nonnull(log_msg))                                                  AS "RAW"
 , rawtohex(utl_raw.cast_to_raw(sys_op_map_nonnull(log_msg)))                                        AS raw_hex
 , rawtohex(standard_hash(sys_op_map_nonnull(log_msg), 'MD5'))                                       AS md5_hex
 , ora_hash(log_msg)
 , dbms_obfuscation_toolkit.md5(input => utl_raw.cast_to_raw(sys_op_map_nonnull(log_msg)))           AS md5
 , rawtohex(dbms_obfuscation_toolkit.md5(input => utl_raw.cast_to_raw(sys_op_map_nonnull(log_msg)))) AS hex

log_msg is CLOB